Toyota FZ engine
|Toyota FZ engine|
|Displacement||4.5 L (4,477 cc)|
|Cylinder bore||100 mm (3.9 in)|
|Piston stroke||95 mm (3.7 in)|
240 hp (180 kW) (FZJ100)
300 lb⋅ft (410 N⋅m) @ 3600 RPM (FZJ100)
|Predecessor||Toyota F engine|
The Toyota FZ engine was a 24-valve, 4.5L DOHC straight-6 internal combustion engine manufactured by Toyota to replace the F-series engine. It was used primarily in SUVs because of its large displacement, smoothness, ruggedness and torque.
The engine displaced 4477 cc with a bore and stroke measuring 100 millimetres (3.9 in) x 95 millimetres (3.7 in), respectively and a 9.0:1 compression ratio; the head used Toyota's narrow-angle overhead camshafts for better fuel economy. The 1FZ had only two variants available: the 1FZ-F and the 1FZ-FE. The only significant difference between the two was the inclusion of electronic fuel injection on the 1FZ-FE, whereas the 1FZ-F used a carburetor.
The 1FZ-F produced 190 horsepower (140 kW) at 4400 RPM and 268 pound-feet (363 N⋅m) at 2800 RPM; its fuel injected counterpart produced 212 horsepower (158 kW) at 4600 RPM and 275 pound-feet (373 N⋅m) at 3200 RPM.
Starting in 1998, the fuel injected version of the 1FZ-FE was also manufactured with a direct ignition variation available in certain non-US markets (the engine pictured here is that variant discernible by the intake manifold and lack of distributor). This version of the engine received many updates over the previous version such as a redesigned head, more compact pistons, updated throttle body, an improved intake manifold with longer intake runners, 4 nozzle fuel injectors to improve fuel atomization and direct ignition. This version of the 1FZ-FE produced 240 horsepower (180 kW) at 4600 RPM and 300 pound-feet (410 N·m) at 3600 RPM on 91 Octane Fuel (RON) without a catalytic converter.
Also, a de-rated LPG version was built for the 7FG/7FZ series forklifts. Called 1FZ-E it produced 63 kW at 2350 RPM and 294 N·m at 1200 RPM 
The 1FZ-F and -FE were used in the following vehicles:
- 1992–2009 Toyota Land Cruiser (FZJ7x)
- 1992–2006 Toyota Land Cruiser (FZJ80)
- 1998–2007 Toyota Land Cruiser (FZJ100, FZJ105)
- 1995–1997 Lexus LX 450 (1FZ-FE only)
- Toyota 7FG/7FD series forklifts
- Drag racer Ben Bray opted for a 1FZ motor, originally found in the 80 series Land Cruiser, and set a new PB[clarification needed] in his Toyota Solara of 6.46 seconds at 217 mph.